反应详情

6-Hydroxy-2-(2-trifluoromethylphenyl)chroman-4-one was prepared as described for 2-(3-fluorophenyl)-6-hydroxychroman-4-one in Example 9(a) starting from 3.0 g of 2′,5′-dihydroxyacetophenone and 3.0 ml of 2-trifluoromethylbenzaldehyde. The product was triturated from ethanol. 1H NMR (300 MHz, d6-DMSO) δ: 9.48 (s, 1H), 8.07 (m, 1H), 7.86-7.79 (m, 2H), 7.66 (m, 1H), 7.15 (d, 1H, J 3.0 Hz), 7.06 (dd, 1H, J 8.8, 3.0 Hz), 6.95 (d, 1H, J 8.8 Hz), 5.70 (dd, 1H, J 13.8, 2.4 Hz), 3.38 (dd, 1H, J −16.9, 13.8 Hz), 2.66 (dd, 1H, J −16.9, 3.0 Hz).

1. customThe product was triturated from ethanol